Rotisserie oven



Nov. 12, 1935. Wl G, SPAKMAN 2,020,808

ROTSS-ERTE OVEN Original Filed Sept. 20, 1932 3 Sheets-Sheet l l 9 4 22% )16 9 E I o 8 O o o 6 :l 37/ 6 v 7 s '1157 25 o! o IZ V 9 o o f o ad o L v, o o o j o 7 10 4 j zo /.\'l '/:`.\'Y`( ,r www@ MMA Nov. l2, 1935. w, G. SPEAKMAN ROTISSERIE OVEN 3 Sheets-Sheet 2 Original Filed Sept. 20, 1952 mN. o

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Patented Nov. i2, l 1935 UNITED 'STATES' PATENT OFFICE 2.920.808 ROTISSERIE OVEN -Williain G. Speakman, PortWashington, N. assignor of two-fifths to The Inventions Exploitation Corporation;

New York, N. Y., a. corporation of Delaware, and one-fifth to Gaetano v Prendini, Port Washington, N.

Application september' 20,1932, serial No. 633,996 Renewed June 7, 1935 10 Claims. (Cl. 219-35) This invention relates to devices for roasting chicken or meats and more particularly to an electrical roasting device.

The'objects of the invention, among others, are: First, to provide an electrical heating device adapted to roast meat by direct heat rays while the roast is slowly turned before the heating unit after the French or rotisscrie manner;

',spit; seventh, to provide a detachable mounting for Ithe electrical resistance coils; eighth, to provide a storage chamber on the oven; and to provide advertising-display visibility for the various elements of the device. Other objects will appear as the description proceeds.

Reference is made to the drawings for illustration of a preferred embodiment of the inventon. in which v Fig. 1 is a front elevation, Fig. 2 is a right end elevation,

Fig. 3 is a left end elevation, a part broken Y away, Y

Fig. 4 is a. section on line 4-4 of Fig. 1.

Fig. 5 is a section on line 5-5 oi Fig. 2, and

Fig. 6 is a section on line 6-5 of Fig.' 1.

'I'he device shown is adapted for six roasts, three chickens being mounted on the upper spit as shown in Fig. 1, and the lower spit providing also for three roasts. The Apyrex glass window I givesI visibility to the storage chamber above the oven adapted to receive the roasted chickens etc. This window I also exposes the motor chamber. Through the pyrex glass window 2 are seen all of the elements of the roasting device. In

the right'end wall are two oven doors or heatshields 3 having extending handles 4 in which the spits s are rotatablymounted. The doors 4 are secured in the right end wall of the oven, which is also hinged at the rear, providing a side door 3| for .the oven, by the L-shaped fasteners E which also lock the side .door 3l in position.

The device as a whole is mounted on suitable feet 1. The frame I Il carries the electric resistance wires 9, an upper and a lower bank related to the upper and lower spits 5, and the guard lattice 8, the several components oi' the heating unit being secured by screws or other securing means,

' Skewers The longitudinal subframes 5D for the resistance banks 9 render'them easily removable for cleaning or boiling, thereby permitting the interior of the oveir to be easily cleaned throughout;

5, and are quickly loosed or fastened in any' position by the thumb nuts 51. When the attendant observes through the pyrex window 2 that the roasts on the skewers II are suitably browned he takes the appropriate handle 4 in hand,l releases the corresponding latch 6, his hand being shielded against burning by the small door 3, and pulls out the spit 5 from the cone I3. A noncircular or square-shaped hole 58 in the loven end of the shaft from the operating mechanism is centrally positioned with reference to the apex. .l

` of the cone I3 which is also carried on the op'- erating shaft. In inserting the spit 5 with the roasts in position it is only necessary for the atl0 tendantto locate the cone I3 with the pointed end of the spit 5 and it is thereupon guided into the square hole 58 in theshaft of the actuating mechanism simultaneously meshing and turning the spit 5 in the oven andin the handle 4 ifromztl` which it is spaced by a suitable rotatable bushing. The importance of this mechanism for practical service may be realized by considering the fact that the air i-n the vent when the door 3 is removed is at roasting temperature and it so is therefore essential to operation by an attendant without burning the hand that the operation of removal or insertion be quickly consummated. The sprocket and cone-shaft bearings I I4 are mounted in the insulating partition I6 symmet- 35 rically and oppositely disposed with reference to the doors or shields 3. The insulatingy PartitionV I5 at the left endI of the storage chamber provides a separate chamber for an electric motor I1, the shaft oi which operates a 'Worm- 4I) gear assembly I8 having a sprocket 30 connected with the sprocket chain I9 which actuates two sprocket wheels 20 ,each concentric with a cone I 3. A suitable switch 2| disposed on the door 'l 28 maybe connected with electric lamps or ood 45 lights (not shown) so disposedas to brilliantly illuminate the,D interior of the device and so produce a brilliant and eye-arresting advertising display. A suitable switch 22 controls the motor. Multiple point resistance switches 23 are 50 connected respectively with the upper and lower electrical resistance heating banks 9 permitting one`v or both to be operated at various temperatures. .Vertical and horizontal cleats 24 support 4lie inner wall oi' the oven. A tray 25 lies in the sa II are mounted in clamps I2 which-are 5 mounted fork lengthwise adjustment on the spits bottom of the storage chamber. The door 2l of the storage chamber is hinged at 53 so that it can be swung up, back, and down to the dotted line position shown in Fig. 2. The oven .door 3l is mounted on the hinges 21 so that it may be opened and swung back to the rear. The end door 28 gives access tothe motor I1 and the gear-actuating mechanism and is removably secured by the six turn buttons 23.

The construction of the dooror shield 3 is shown in Fig. 5. Two iam nuts 32 turning on the inner screwthreaded end of the handle 4 clamp it securely on the shield 3; The bushing 33 fits rotatably within the lcylindrical end of' the handle 4 and is fixed on the spit 5 by the pin 34. Ihe shield 3 is a shell-like structure with v beveled inner edges of simple construction with one edge crimped over the other and it is filled with'insulating material such as magnesia. The spit 5 is square shaped and is centrally posi- 'i tioned in the handle 4 from which it is separated ,i by air spaces and bears on its inner end a bushing 36 rotatably mounted in the handle 4 and iixed on the spit 5 by the -pin 31. The screw 33 passed through the handle is a position locking screw for the bushing 3 5 and therefore the spit 5. The crimped locking edges of the y shells forming the shield 3 and the door 3i afford a simple and inexpensive manufacturing construction. The lower edge of the opening in the door 3i adapted to receive the shield 3 which is provided with a U-lip 33 which reinforces the edge and assures a snug fit of the shield 3. Referring now to Fig. 6 the nut bolts 4I pass through a' ange of the shaft bearing I4 and by washers 43 secure the bearing I4 in the partition I6. l A circular spacer 43 forms a wall for the insulating material 44. The sprocket wheel 23 is mounted on one'end of the shaft or stud 45 in the other end of which is 4an axial recess 55. A strap 42 is riveted to the cone I3 and to the cone-bushing 43, which has a noncircular orsquare hole 53 for engaging the spit 5, and to the inner end of the shaft 45 thereby making a singlerotatable assembly in the bearing I4. Longitudinal spacers 43 in the walls separate the insulating material 5I into. sections and therefore keep it equally'distributed while the fastening screws 49 secure the spacers in positicn and hold the walls equidistant. The inner wall cleats 52 also provide a support for the removable drip pan 54 ywhich overlies the-sections of floor insulation 53.

The operation of the device is now fully apparent'. Latches 5 are turned back singly to release the adjacent door-shield 3. Handles 4 enable the spit to be withdrawn without burning the hand of the attendant. A plurality of chickens or other roastsare placed on the skewers II,

one at a time, and positioned on the spit, and the clamp nuts 51 locked. -When a spit 5 is loaded and inserted in the door of the oven the point is pushed into the cup I3 and home into the hole 53 and the lower edge of the shield 3 is pushed up to secure the lip 33 and the latch 5 is then turned down to lock the oven tight and the spit in rotatable connection. 'Ihe other spit 5 is similarly loaded. Then the switches 2i, 22,. and 23 are turned on, the device being illuminated, the motor started to rotate the spits, and the resistance vbanks heated up. It is evident that cooking in this device gives 'the delicious palatable flavors of the rotisserie methods of direct heat on the` ifatter outside layers and also combines the usual roasting process of an oven, the combination of well as delicious flavors roasting effects giving interior cooking of the inside meat. After roastingisilnishedasmaybeobservedthroughthe transparent front window the storage chamber door 26 is opened, the spits removed, and the roasts placed on the pan 25 until required for serving.

Having now disclosed one embodiment of my invention and realizing that, in view of my disclosure many modifications in details of construction or design will readily occur to those skilled in the art I do not choose to limit myself except as in the appended claims.

I claim: y

1. An electrical roasting device comprising in combination, an oven, a transparent wall in said oven, an electrical heating device in said oven, a rotatable spit having a pointed end and a-bearing in the side wall of said oven, said bearing being removably mounted in said side wall,- said spit and bearing being removable as a unit and means for driving said spit mounted in the opposite wall of said oven,the pointed end of the spit being in rotational engagement with the driving means, and being adapted to be withdrawn, or disengaged, when the spit and removable bearing are taken out of the oven.

2. An electrical roasting device comprising in combination, an oven, the walls of said oven be- 30 ing formed of sheets of metal with insulation in between; a transparent wall in said oven, -an electrical heating device in said oven,a spit having a bearing in the side wall of said oven, said bearing being removably mounted in said side u wall,I the spit and bearing being removable as a unit, a hand shield connected with said bearing and adapted to close an opening in said side wall said hand shield being formed of two metal walls with insulation in between, a handle for the spit carried'on the outside of said shield, and means for locking said shield in said side wall.

3. `An electrical roasting device comprising in combination, a closed oven, a transparent wall in said oven, an electrical heating device insaid oven, a spit having a pointedend and a bearing in the side wall of said oven, said bearing being removablymounted in said side wail, the spit and bearing being removable as a unit, and means for driving said spit mounted in'the opposite wall of said oven, said means comprising a rotatable shaft and a noncircular hole in the inner 'end thereof adapted to engage said spit, the

pointed end of the spit being in rotational engagement with. the driving means, and being 'adapted to be withdrawn, or disengaged, whe'n the spit and removablebearing are taken out of the oven.

4. An electrical roasting device comprising in l combination, a heat-insulated oven, a transparent wall in said oven, an electrical heating device in said oven, a rotatable spit having a pointed end and a. bearing in a side wall of said oven, said bearing being removably mounted in said side wall, the spit and bearing being removable as a unit, anda second bearing for said spit metrically disposed in an opposite side wall, said second bearing carrying a cup-shaped element within said oven adapted to guide the end of said spit into the second bearing, the pointed end of the spit being in rotational engagement with the driving means, and being adapted to be withdrawn, ordisengaged, when the spit and removable bearing are taken out of the oven.

5. An electrical roasting device comprising in combination, a 4heat-insulated oven. a tramiposite side wall of the oven. a noncircular hole said hole, the pointed end o! aoaoos parent wall in said oven, an electrical heating de# vice in said oven, a rotatable and pointed spit having a bearing in the side wall of said oven. said bearing being removably mounted in said side wall, the spit and bearing being removable as a unit, a rotatable actuating member in the opin the end oi said member, and a cup shaped element mounted on vsaid member about said hole, the pointed end ofy the spit being in rotational engagement with the driving means. and being adapted to be withdrawn, or disengaged, when the spit and removable bearing are taken out of the oven.

6. An electrical roasting device comprising in combination, a heat-insulated oven, a transparent wall in said oven, an electrical heating device in said oven, a rotatable noncircular and pointed spit having a bearing in a side wall of said oven, said bearing being removably mounted in said side wall. the spit and bearing beingremovable as a unit, a rotatable actuating member mounted in a bearing in the opposite side wall of the oven. a noncircular hole in the inner end of said member, and a cup shaped element mounted on the inner end of said member around the spit being in rotational engagement with the driving means, and being adapted to be withdrawn, or disengaged, when the spit and removable bearing are taken out of the oven.

'1. An electrical roasting device comprising in combination. a heat-insulated oven,` a transparent wall in said oven, an electrical heating device in said oven. a rotatable noncircular and pointed spit having a bearing in a side wall of said oven,v said bearing comprising a handle and and a rotatable actuating member mounten in' within said cup, the pointed end o! the spit being in rotational engagement with the driving means,

and being adapted to be withdrawm-or disengaged, when the spit and removable bearing are taken out of the oven.

8.Anelectricalroastingdevice0mprisingin combinatiomanovemsaidovenbeingclosedto allaircurrents rotatably mounted in nued with minerai insulating material. a window of transparent heat-resisting material formed in one of the vertical walls, a rota ble bearing in i'or rotating said bearing, an opening in the op- 5 posite vertical wall, a cover for said opening having inner and outer walls of sheet metal with a lling of mineral insulating material in between,

a handle externally mounted on said cover, a spit rotatably mounted in said cover and having an lo end adapted to engage with the rotatable bearing in the opposite wall. and electrical resistance units mounted wit the oven and parallel to said spit.

9. An electrical roasting device comprising in i5 combination, an oven, said oven being closed to all air currents' of convection and having enclosing walls formed of inner and outer layers oi' sheet .metal with the interstices substantially iilled with mineral insulating material, a pluralv20 ity of spacing devices between the inner and outer walls adapted to. maintain the insulating 'material invposltion, a window ot transparent 'heat-resisting material formed in one oi' the ver- A tical walls, a

rotatable bearing in another, ver- 25 tical wall, vmeans external to said wall iorrotating said bearing, vertical wall, a cover for said opening having inner and outer walls of sheet metal with a illling of mineral insulating material in between,y e730 handle lmounted on said cover, a spit said cover and having an end adapted to engage with the rotatable bearing in the opposite wall, and electrical resistance units mounted within the oven and parallel to 35 said Spit.

10. An electrical roasting device comprising in combination. an oven, said oven being closed to all air currents of convection and having enclosforsaidopeninginsulatingmaterial, mounted on said cover. a spitrotatablymountedinsaidcoverandhaving to man with the rotatable beadngintheoppodtewalLandelectricairesist-II anceunitsmountedwitbintheovenandparaliel mamma.

anopeningintheopposite.I 

